Window lock



F. F" LARSON Jam 16, 1940a WINDOW LOCK Filed April 4, 1938 E]? arson INVENTOR ATTORNEYS Patented Jan. 16, 1940 UNITED STATES PATENT GFFHCE 4 Claims.

This invention relates to window locks and more particularly to a device of this character whicirmay be applied either to multiple sash or single sash sliding window structures to lock the sashes in either closed or partially open position.

The invention has for its principal object to improve generally upon window locking devices and to produce a simple yet strong and durable structure which is readily applied and adjusted.

Other and more specific objects to be attained will hereinafter more fully appear.

The invention consists in the general structure and in the particular parts and combinations and arrangements of parts thereof as hereinafter described and set forth, in the appended claims, reference being had to the accompanying drawing forming a part of this specification, and in lwhich Figure l is a fragmentary view showing-the meeting corner portions of an upper and lower window -sash with the locking device applied thereto;

Figure 2 is a section, on an enlarged scale, taken on or about the line 22 of Figure 1;

Figure 3 is a cross section through the bolt element and adjacent portion of the housing, taken on or about the'line' 3--3 of Figure 2; and

Figure 4 is a section on the line 44 of Figure 2.

Referring now to the drawing the numeral l0 designates the upper sash of a window and the numeral ll designates the lower sash thereof, said. sashes being ofthe usual vertical sliding type.

On the inner face of one of the vertical side rails of the sash. frame isia rack plate 12, said plate being corrugated transversely or otherwise formed. to produce the multiplicity of teeth 43 thereon, and the plate being secured to the sash rail by ordinary wood. screws l4. Mounted on the top or" the lower sash is a cylindrical bolt housing I5 having longitudinal. base flanges It on opposite sides thereof, said base flanges being secured to the sash H by screws ll. As shown, the longitudinal side flanges l6 merge at their rear ends with a transverse base flange extension l8 whose rear end portion 49 is turned down- Wardly over the rear edge portion of the sash H as shown more clearly in Figure 2.

Located within the cylindrical housing I5 is a latch bolt 2! of general cylindrical form, the main body portion of which may be either solid or hollow. As shown, the bolt has a cylindrical enlargement or head portion 2! at its rear end which is of a diameter to fit slidably within the cylinder l5, while the extreme end portion of the head 21 is squared, as at 22, and provided on its outer face with a multiplicity of teeth or corrugations 23 to fit and interlock Withthe teeth iii of said rack plate It on the upper sash l0.

Surrounding the reducedbody or shank portion El of the bolt within the cylindrical housing i5 is a coil spring 24, one end of which abuts the annular shoulder formed by the cylindrical enlargement or head portion 2! of the bolt, and the opposite end of the spring abutting a longitudinally adjustable plate 25 which is located in the outer end portion of the housing [5 and held by an adjusting screw 26 provided in a cap member 27 secured on the forwardlyprojecting end portion 28 of the housing. By the foregoing construction and arrangement the latch bolt is normally urged into interlocking engagement with said rack plate l2 and the tension of the spring 2 is regulated by adjusting the screw 26, and in this connection it is noted that the downturned flange portion IQ of the rear base flange it of the cylindrical housing l5 affords an ample end thrust support for said housing against the reactive force of the spring 24.

lever 29 is an arcuate downward extension 35 provided on its circumferential portion with an upper series of ratchet teeth 36 and a lower series of reversely shouldered similar teeth 31. By manipulating the lever 29, that is to say, by

raising the forward portion of said lever the rear angular arm 32' thereof is swungforwardly and moves the latch bolt a corresponding distance forwardly in said housing 25 and against the tension of the spring 24, and to releasa'oly lock said lever 29 so as to hold the latch bolt 20 retracted the end cap member ii is provided with a forwardly extending resilient arm 38 having an up-turned outer end extension 39 provided at its extreme endportion with a pair of opposed,

teeth 49, ll which are normally held in, engaging relation to the ratchet teeth 36 or 31, by the inherent resiliency of the member 39, which latter is provided with a knob or handle member 42, by which said member 39 may be moved to release said teeth 48 and 4| from said ratchet teeth 36 and 31, at will.

Preferably, a guard or guide for said lever 29 is provided, as shown in Figures 2 and 4, said guard comprising a single piece of sheet material bent upon itself to provide opposed spaced side plates 43 between which the lever 29 extends forwardly from its pivot 30 and the looped connecting portion between-said plates 43 being at sufficient height to permit ample vertical swing of said lever 29, said plate portions 43 each having a pair of arcuate tongue portions 45 extending around the adjacent opposite side portions of said cylindrical bolt housing l5 and secured rigidly thereto by welding or any other approved method of fastening.

By the foregoing, it is noted that a secure sash lock is provided whereby the sash may be locked either in closedor partially opened position and that in the case of its application to cooperating upper and lower sashes as shown in the drawing and the lock set to hold the sash in partially opened position either the lower sash may be raised to the limit set by the lock or the upper sash accordingly lowered, that is to say, the two sashes move together in either direction. So, too, it is obvious that the device may be applied to single sashes, in which case the rack plate 12 may be mounted on the sash frame and the latch bolthousing l5 located on the window frame. In any case, the bolt 26 is held in looking relation to the rack plate I 2 by the engagement of the tooth 4| on the member 39 with the arcuate' ing the screw element 26.

Obviously, the structure admits of considerable modification within the spirit of the invention as defined by the appended claims. The invention,

therefore, is not limited to the specific construo- I tion shown in the accompanying drawing.

' What is claimed is:

1. A window lock comprising a bolt housing, a spring pressed bolt in said housing normally urgedinto engaging relation with a detached keeper element, a lever element cooperatively en gaged with said bolt for retracting the latter, said lever element having an arcuate free end portion provided with two series of oppositely directed ratchet teeth, and a latching extension on said bolt housing having provision for interlocking ratchet engagement alternatively with the two series of teeth on said lever element whereby to lock the bolt in extended or retracted position, at will.

2. A window lock comprising a cylindrical bolt housing having base flanges at its opposite sides for the mountingthereof and an end base flange formed with an angular end thrust abutment, a spring-pressed bolt element in said housing, said bolt element having its keeper-engaging end portion normally urged beyond the end base flange of the housing, an operating lever mounted on said housing and having an angular extension engaging in a socket provided therefor in said lating handle and an arcuate extension provided with two series of oppositely directed ratchet teeth, and a releasable latch element on said bolt housing having an opposed pair of teeth respectively engageable with one of the series of ratchet teeth of said operatinglever whereby to hold said bolt element in extended or retracted position, at will.

3. A window lock comprising a cylindrical bolt housing having base flanges for the mounting thereof, a bolt element having a cylindrical head portion working in said housing, said head portion extending beyond the adjacent end of the housing and provided at its extreme end portion with keeper-engaging means, the inner end of the head providing an annular spring-receiving shoulder, a spring element surrounding said bolt element and bearing against said spring-receiving shoulder for normally urging said bolt ele- 'ment with its keeper-engaging end portion projected from the bolt housing, an operating lever pivotally mounted on the bolt housing adjacent the end thereof and having an angular extension engaging in a socket provided therefor in the head portion of said bolt element, said lever extending beyond the opposite end of the housing and provided with a manipulating handle and 'anarcuate ratchet extension, a cap member on the adjacent end portion of the bolt housing provided with a resilient arm extending longitudinally therefrom and formed with an angular extension, said angular extension having a toothed portion engageable with the arcuate ratchet extension of said operating lever, and a manipulating knob on said resilient arm extension for springing said extension to disengage the toothed portion thereof from said ratchet extension of the lever.

'4. A window lock comprising 'a latch bolt housing including a cylindrical body portion open at its inner end and provided at its outer end with a cap member, a generally cylindrical bolt element of smaller diameter in said cylindrical body portion, said bolt element having a cylindrical head enlargement adjacent its outer end fitted slidably to the cylindrical body portion of the bolt housing and formed with a rectangular extreme outer end portion having keeper-engaging provision on its outer face and its bottom edge portion being slidable upon a rear base flange portion of the bolt housing body, the inner end of said cylindrical head providing an annular spring-receiving shoulder, a longitudinally adjustable abutment within said housing adjacent said end cap member thereof, an axial adjusting screw on said cap member in cooperative relation to said abutment member, a spring element coiled about said bolt element and interposed between said longitudinally adjustable abutment and the shouldered head portion of the bolt element, an operating lever pivotally mounted at its inner end between an upstanding pair of cars provided therefor on the adjacent inner end portion of the housing body cylinder, said lever having an angular extension cooperatively engaged" in a socket provided therefor in the adjacent head portion of said bolt element, said operating lever extending forwardly beyond the outer end of said housing body cylinder, and means for releasably locking said operating lever in different actuated positions for holding the bolt element in extended keeper-engaging and retracted keeper-disengaged positions.

- FRITZ. F. LARSON. 

